To make a wordformula from the setting on the left you must find regularity!

You can see at each table there are 4 chairs. So if you know the number of tables you have to multiply by 4. But, be aware of the fixed amount! At the end there are 2 more chairs

Number of tables times 4 plus 2 is the number of chairs

7.1

Slide 3 - Slide

And again: At this table always 6 chairs. So if you know the number of chairs you have to multiply with 6. But!!! At the end there are 2 more chairs so you must add 2 as well.

The number of tables times 6 plus 2 is the number of chairs.

Formula: number of tables x 6 + 2 = number of chairs

Fixed amount and 'per' number

Slide 4 - Slide

How to make a wordformula from the setting on the left you must find regularity!

You can see at each table there are 4 chairs. So if you know the number of tables you have to multiply by 4. But, be aware of the fixed amount! At the end there are 2 more chairs

Number of tables times 4 plus 2 is the number of chairs

Slide 5 - Slide

It doesn't matter how many cupcakes she makes, the 12 euros is just once. The 12 euros is what we call the fixed amount

Profit = .... - number of cupcakes x .....

Slide 6 - Slide

It doesn't matter how many cupcakes she makes, the 12 euros is just once. The 12 euros is what we call the fixed amount

Profit = 12 - number of cupcakes x 0,80

Slide 7 - Slide

7.2

Graphs from formulas: method-theory

Slide 8 - Slide

7.2

Graphs from formulas: method-theory

Slide 9 - Slide

In this formula time is in hours and the distance in km.

Calculate the distance in case you've cycled for 3 hours.

15 x time =distance

7.2

Slide 10 - Slide

In this formula time is in hours and the distance in km.

Calculate the distance in case you've cycled for 3 hours.